JAMB - Mathematics (2001 - No. 39)
| ⊗ | k | l | m |
| k | l | m | k |
| l | m | k | l |
| m | k | l | m |
The identity element with respect to the multiplication shown in the table above is
o
m
l
k
Paliwanag
An element e of the binary expression * is said to be the identity if for any a * e = a
from the given table the identity element is m
i.e K ⨁ m = k
k ⨁ m = k.